5646
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 21
- Digital Root
- 3
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 11304
- Proper Divisor Sum (Aliquot Sum)
- 5658
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- yes
Derived Values
- Euler's Totient
- 1880
- Möbius Function
- -1
- Radical
- 5646
- Omega Function (Ω)
- 3
- Little Omega Function (ω)
- 3
Special
- Factorial
- no
- Catalan Number
- no
- Bell Number
- no
- Motzkin Number
- no
- Primorial
- no
Figurate Numbers
- Fibonacci Number
- no
- Triangular Number
- no
- Perfect Square
- no
- Perfect Cube
- no
- Pentagonal Number
- no
- Hexagonal Number
- no
- Lucas Number
- no
- Tetrahedral Number
- no
- Pell Number
- no
- Tribonacci Number
- no
- Pronic Number
- no
Recreational
- Happy Number
- no
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 59
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- Squarefree Number
- yes
- Prime Power
- no
- Prime Factorization
- no
- Twin Prime
- no
- Mersenne Prime
- no
- Sophie Germain Prime
- no
- Safe Prime
- no
- Powerful Number
- no
- Achilles Number
- no
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- yes
- Odd
- no
Appears in sequences
- Number of n step self-avoiding walks on 3 X infinity grid starting from (0,1).at n=11A007825
- Coordination sequence T3 for Zeolite Code SGT.at n=47A008231
- Numbers k such that the continued fraction for sqrt(k) has period 56.at n=21A020395
- Numbers k such that Fibonacci(k) == 8 (mod k).at n=44A023177
- Expansion of (theta_3(z)*theta_3(11z) + theta_2(z)*theta_2(11z))^3.at n=44A028611
- a(n) = A034997(n)/2.at n=4A045990
- a(n) = floor( n^e ), e = 2.718281828...at n=23A061293
- Decimal part of 1/a(n) starts with Fibonacci(n) (leading zeros excluded).at n=21A099405
- Numbers k such that 3*10^k + 5*R_k + 2 is prime, where R_k = 11...1 is the repunit (A002275) of length k.at n=9A102972
- Numbers n such that 8*10^n + 7*R_n - 6 is prime, where R_n = 11...1 is the repunit (A002275) of length n.at n=7A103089
- Real part of (n + i)^5.at n=6A121672
- Number of rooted trees on n nodes with thinning limbs.at n=14A124343
- Positive numbers of the form x^5-10x^3*y^2+5x*y^4 (where x,y are integers and x>y).at n=3A135791
- Numbers of the form x^5-10x^3*y^2+5x*y^4 (where x,y are integers).at n=12A135793
- a(0) = 0, a(1) = 1; for n > 1, a(n) = a(n-2) + a(n-1) + A000071(n+1).at n=14A140992
- List of different composite numbers in Pascal-like triangles with index of asymmetry y = 1 and index of obliqueness z = 0 or z = 1.at n=39A141065
- Number of numbers removed in each step of Eratosthenes's sieve for 10^6.at n=9A145539
- Number of line segments connecting exactly 4 points in an n x n grid of points.at n=19A177720
- Number of isomorphism classes of nanocones with 3 pentagons and a nearsymmetric boundary of length n.at n=24A198014
- Number of ordered triples (w,x,y) with all terms in {1,...,n} and w^3 >= x^3 + y^3.at n=27A211651